Mithrandir Metrics
Player Chicago White Sox Refreshed Sep 3 06:00 AM ET
Player profile / Chicago White Sox

Luis Castillo

P · Bats/Throws R/R · 6' 2", 200 lb · Age 33

Cards
27
Modules
1
Live Δ
yes
Club Chicago White Sox Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
202411123.6430300175.11751.17
20251183.5432320180.21621.18
20264115.5726230126.01091.46
10 Seasons88953.7226926601536.216021.20
At a glance

Season percentile report

The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.

2026-09-03
36
Pitching
percentile
Pitching9 metrics
36
Arsenal5 metrics
71
Rolling projection

Preseason / current pace / Bayesian update

Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.

2026-09-03
ERA preseason3.99
ERA current pace5.31
ERA rolling p504.92
Observed weight71%
ERA
3.79 4.33 4.92 5.52 6.06
FIP
3.96 4.29 4.66 5.02 5.35
K%
17.7% 18.8% 19.9% 21.1% 22.1%
BB%
5.6% 6.1% 6.7% 7.3% 7.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-03
Pitching · percentile strip
WHIP1.45
29
ERA5.31
20
BB%6.8%
79
K%19.1%
29
xwOBA allowed0.341
23
Barrel allowed9.7%
18
Fastball velo95.3
64
Hard-hit allowed43.7%
17
Whiff%22.0%
43
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-09-03
Changeup Stuff+106
81
Fastball Stuff+102
46
Mithrandir Stuff+104
72
Sinker Stuff+107
90
Slider Stuff+103
64
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

12 snapshots
Mithrandir Metrics ROLLING XWOBA LINE Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Rolling xwOBA allowed Castillo, Luis · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.341 2026-08-23: 0.3362026-08-24: 0.3362026-08-25: 0.3392026-08-26: 0.3392026-08-27: 0.3392026-08-28: 0.3392026-08-29: 0.3392026-08-30: 0.3412026-08-31: 0.3412026-09-01: 0.3412026-09-02: 0.3412026-09-03: 0.341 2026-08-23 2026-09-03 xwOBA allowed MITHRANDIR · CHARTS
Optimization map

Arsenal optimization map

Pitch-shape context from this pitcher’s current arsenal snapshot. Hover a pitch to inspect usage, movement, and bat-missing context.

6Pitches 2026Season 42%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
Zone profile

Aggregate zone heatmap

Aggregate zone metrics from seasonal Statcast leaderboards.

Mithrandir Metrics ZONE HEATMAP Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Pitch Zone Profile Castillo, Luis · Aggregate zone metrics; not pitch-by-pitch locations Edge: 39%39%Zone: 49%49%Whiff: 22%22%Called strike: 13%13%First pitch strike: 58%58%Hard hit allowed: 44%44% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2026 pitch-level arsenal aggregates; current season takes over after 100 tracked pitches across at least 2 pitch types. Descriptive pitch-type Stuff+ composition. Not a promoted predictive metric.

Watch the pitches in 3D →

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Castillo, Luis · 2026 arsenal snapshot 4-Seam Fastball: 41.9%Slider: 24.7%Sinker: 18.5%Changeup: 14.6%Cutter: 0.3%Pitch Out: 0.0% FF42% · 95 mphprimary pitch FF 42%SL 25%SI 19%CH 15%FC 0%PO 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Castillo, Luis · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 42% usage, 2″ horizontal break, 18″ drop, 95.3 mphFF95 mphSlider: 25% usage, 0″ horizontal break, 36″ drop, 85.6 mphSL86 mphSinker: 19% usage, 6″ horizontal break, 26″ drop, 95.4 mphSI95 mphChangeup: 15% usage, 10″ horizontal break, 36″ drop, 87.5 mphCH87 mphCutter: 0% usage, 2″ horizontal break, 24″ drop, 91.6 mphFC92 mphPitch Out: 0% usage, 12″ horizontal break, 21″ drop, 89.4 mphPO89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 42.4% 596 102 qualified
SL 24.7% 347 103 qualified
SI 18.1% 254 107 qualified
CH 14.7% 207 106 qualified
FC 0.1% 1 112 limited sample
Method note

Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.

Reference layer

Current snapshot

Age33
Height6' 2"
Weight200 lb
Debut2017-06-23
Live layer

Delta / regression

ERA Δ+1.24
K% Δ-0.015

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.1σ gap
wOBA-against (actual)0.394
xwOBA-against (deserved)0.341

Castillo’s wOBA-against sits at 0.394, but the quality of contact underneath says it should be 0.341 — a gap of 0.053, 2.1 standard deviations from the MLB norm over 129 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching272026-09-03Sinker played up through SI/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202620.7% K | 4.07 ERAProjection
2026-04-11 vs HOU7 ER / 3 K3.1 IP
2026-04-05 @ LAA3 ER / 4 K3.2 IP
2026-03-30 vs NYY0 ER / 7 K6.0 IP